package com.terren.webdig.common.util;

import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

public class BeanUtil {
	/**
	 * 取Bean的属性和值对应关系的MAP
	 * 
	 * @param bean
	 * @return Map
	 */
	public static Map<String, String> getFieldValueMap(Object bean) {
		Class<?> cls = bean.getClass();
		Map<String, String> valueMap = new HashMap<String, String>();
		Method[] methods = cls.getDeclaredMethods();
		Field[] fields = cls.getDeclaredFields();
		for (Field field : fields) {
			try {
				String fieldType = field.getType().getSimpleName();
				String fieldGetName = parGetName(field.getName());
				if (!checkGetMet(methods, fieldGetName)) {
					continue;
				}
				Method fieldGetMet = cls.getMethod(fieldGetName, new Class[] {});
				Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});
				String result = null;
				if ("Date".equals(fieldType)) {
					result = fmtDate((Date) fieldVal);
				} else {
					if (null != fieldVal) {
						result = String.valueOf(fieldVal);
					}
				}
				// String fieldKeyName = parKeyName(field.getName());
				if (null != result) {
					valueMap.put(field.getName(), result);
				}
			} catch (Exception e) {
				continue;
			}
		}
		return valueMap;
	}

	/**
	 * 取Bean的属性和值对应关系的MAP
	 * 
	 * @param bean
	 * @return Map
	 */
	public static void getFieldValue2Map(Object bean, Map<String, Object> valueMap) {
		Class<?> cls = bean.getClass();
		Method[] methods = cls.getDeclaredMethods();
		Field[] fields = cls.getDeclaredFields();
		for (Field field : fields) {
			try {
				String fieldGetName = parGetName(field.getName());
				if (!checkGetMet(methods, fieldGetName)) {
					continue;
				}
				Method fieldGetMet = cls.getMethod(fieldGetName, new Class[] {});
				Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});
				// String fieldKeyName = parKeyName(field.getName());
				if (null != fieldVal) {
					valueMap.put(field.getName(), fieldVal);
				}
			} catch (Exception e) {
				continue;
			}
		}
	}

	/**
	 * 取Bean的属性和值对应关系的MAP
	 * 
	 * @param bean
	 * @return Map
	 */
	public static Map<String, Object> getFieldValue2Map(Object bean) {
		Map<String, Object> valueMap = new HashMap<String, Object>();
		Class<?> cls = bean.getClass();
		Method[] methods = cls.getDeclaredMethods();
		Field[] fields = cls.getDeclaredFields();
		for (Field field : fields) {
			try {
				String fieldGetName = parGetName(field.getName());
				if (!checkGetMet(methods, fieldGetName)) {
					continue;
				}
				Method fieldGetMet = cls.getMethod(fieldGetName, new Class[] {});
				Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});
				// String fieldKeyName = parKeyName(field.getName());
				if (null != fieldVal) {
					valueMap.put(field.getName(), fieldVal);
				}
			} catch (Exception e) {
				continue;
			}
		}
		return valueMap;
	}

	/**
	 * set属性的值到Bean
	 * 
	 * @param bean
	 * @param valMap
	 */
	public static void setFieldValue(Object bean, Map<String, String> valMap) {
		Class<?> cls = bean.getClass();
		// 取出bean里的所有方法
		Method[] methods = cls.getDeclaredMethods();
		Field[] fields = cls.getDeclaredFields();

		for (Field field : fields) {
			try {
				String fieldSetName = parSetName(field.getName());
				System.out.println(fieldSetName);
				if (!checkSetMet(methods, fieldSetName)) {
					continue;
				}
				Method fieldSetMet = cls.getMethod(fieldSetName, field.getType());
				// String fieldKeyName = parKeyName(field.getName());
				String fieldKeyName = field.getName();
				String value = valMap.get(fieldKeyName);
				if (null != value && !"".equals(value)) {
					String fieldType = field.getType().getSimpleName();
					if ("String".equals(fieldType)) {
						fieldSetMet.invoke(bean, value);
					} else if ("Date".equals(fieldType)) {
						Date temp = parseDate(value);
						fieldSetMet.invoke(bean, temp);
					} else if ("Integer".equals(fieldType) || "int".equals(fieldType)) {
						Integer intval = Integer.parseInt(value);
						fieldSetMet.invoke(bean, intval);
					} else if ("Long".equalsIgnoreCase(fieldType)) {
						Long temp = Long.parseLong(value);
						fieldSetMet.invoke(bean, temp);
					} else if ("Double".equalsIgnoreCase(fieldType)) {
						Double temp = Double.parseDouble(value);
						fieldSetMet.invoke(bean, temp);
					} else if ("Boolean".equalsIgnoreCase(fieldType)) {
						Boolean temp = Boolean.parseBoolean(value);
						fieldSetMet.invoke(bean, temp);
					} else {
						System.out.println("not supper type" + fieldType);
					}
				}
			} catch (Exception e) {
				continue;
			}
		}
	}

	public static void setFieldValue(Object bean, String name, String value) {
		Class<?> cls = bean.getClass();

		Field[] fields = cls.getDeclaredFields();
		for (int i = 0; i < fields.length; i++) {
			Field field = fields[i];
			String varName = field.getName();
			String type = field.getType().toString();
			type = type.substring(type.lastIndexOf(".") + 1, type.length());
			try {
				if (varName.equals(name)) {
					Object v = null;
					if (type.equals("boolean") || type.equals("Boolean")) {
						v = Boolean.parseBoolean(value);
					} else if (type.equals("Integer")) {
						v = Integer.parseInt(value);
					} else if (type.equals("int")) {
						v = Integer.parseInt(value);
					} else if (type.equals("String")) {
						v = value;
					} else if (type.equals("double") || type.equals("Double")) {
						v = Double.parseDouble(value);
					} else if (type.equals("long") || type.equals("Long")) {
						v = Long.parseLong(value);
					}

					field.setAccessible(true);
					field.set(bean, v);
				}
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	/**
	 * 格式化string为Date
	 * 
	 * @param datestr
	 * @return date
	 */
	public static Date parseDate(String datestr) {
		if (null == datestr || "".equals(datestr)) {
			return null;
		}
		try {
			String fmtstr = null;
			if (datestr.indexOf(':') > 0) {
				fmtstr = "yyyy-MM-dd HH:mm:ss";
			} else {
				fmtstr = "yyyy-MM-dd";
			}
			SimpleDateFormat sdf = new SimpleDateFormat(fmtstr, Locale.UK);
			return sdf.parse(datestr);
		} catch (Exception e) {
			return null;
		}
	}

	/**
	 * 日期转化为String
	 * 
	 * @param date
	 * @return date string
	 */
	public static String fmtDate(Date date) {
		if (null == date) {
			return null;
		}
		try {
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
			return sdf.format(date);
		} catch (Exception e) {
			return null;
		}
	}

	/**
	 * 判断是否存在某属性的 set方法
	 * 
	 * @param methods
	 * @param fieldSetMet
	 * @return boolean
	 */
	public static boolean checkSetMet(Method[] methods, String fieldSetMet) {
		for (Method met : methods) {
			if (fieldSetMet.equals(met.getName())) {
				return true;
			}
		}
		return false;
	}

	/**
	 * 判断是否存在某属性的 get方法
	 * 
	 * @param methods
	 * @param fieldGetMet
	 * @return boolean
	 */
	public static boolean checkGetMet(Method[] methods, String fieldGetMet) {
		for (Method met : methods) {
			if (fieldGetMet.equals(met.getName())) {
				return true;
			}
		}
		return false;
	}

	/**
	 * 拼接某属性的 get方法
	 * 
	 * @param fieldName
	 * @return String
	 */
	public static String parGetName(String fieldName) {
		if (null == fieldName || "".equals(fieldName)) {
			return null;
		}
		int startIndex = 0;
		if (fieldName.charAt(0) == '_')
			startIndex = 1;
		return "get" + fieldName.substring(startIndex, startIndex + 1).toUpperCase()
				+ fieldName.substring(startIndex + 1);
	}

	/**
	 * 拼接在某属性的 set方法
	 * 
	 * @param fieldName
	 * @return String
	 */
	public static String parSetName(String fieldName) {
		if (null == fieldName || "".equals(fieldName)) {
			return null;
		}
		int startIndex = 0;
		if (fieldName.charAt(0) == '_')
			startIndex = 1;
		return "set" + fieldName.substring(startIndex, startIndex + 1).toUpperCase()
				+ fieldName.substring(startIndex + 1);
	}

	/**
	 * 获取存储的键名称（调用parGetName）
	 * 
	 * @param fieldName
	 * @return 去掉开头的get
	 */
	public static String parKeyName(String fieldName) {
		String fieldGetName = parGetName(fieldName);
		if (fieldGetName != null && fieldGetName.trim() != "" && fieldGetName.length() > 3) {
			return fieldGetName.substring(3);
		}
		return fieldGetName;
	}

	public static PropertyDescriptor getPropertyDescriptor(Class<?> clazz, String propertyName) {
		StringBuffer sb = new StringBuffer(); // 构建一个可变字符串用来构建方法名称
		Method setMethod = null;
		Method getMethod = null;
		PropertyDescriptor pd = null;
		try {
			Field f = clazz.getDeclaredField(propertyName); // 根据字段名来获取字段
			if (f != null) {
				// 构建方法的后缀
				String methodEnd = propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);
				sb.append("set" + methodEnd); // 构建set方法
				setMethod = clazz.getDeclaredMethod(sb.toString(), new Class[] { f.getType() });
				sb.delete(0, sb.length()); // 清空整个可变字符串
				sb.append("get" + methodEnd); // 构建get方法
				// 构建get 方法
				getMethod = clazz.getDeclaredMethod(sb.toString(), new Class[] {});
				// 构建一个属性描述器 把对应属性 propertyName 的 get 和 set 方法保存到属性描述器中
				pd = new PropertyDescriptor(propertyName, getMethod, setMethod);
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return pd;
	}

	public static void setProperty(Object obj, String propertyName, Object value) {
		Class<? extends Object> clazz = obj.getClass();// 获取对象的类型
		PropertyDescriptor pd = getPropertyDescriptor(clazz, propertyName);
		Method setMethod = pd.getWriteMethod();// 从属性描述器中获取 set 方法
		try {
			setMethod.invoke(obj, new Object[] { value });// 调用 set
			// 方法将传入的value值保存属性中去
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static Object getProperty(Object obj, String propertyName) {
		Class<? extends Object> clazz = obj.getClass();// 获取对象的类型
		PropertyDescriptor pd = getPropertyDescriptor(clazz, propertyName);
		Method getMethod = pd.getReadMethod();// 从属性描述器中获取 get 方法
		Object value = null;
		try {
			value = getMethod.invoke(obj, new Object[] {});// 调用方法获取方法的返回值
		} catch (Exception e) {
			e.printStackTrace();
		}
		return value;// 返回值
	}

	public static boolean checkFieldValueNull(Object bean) {
		boolean result = true;
		if (bean == null) {
			return true;
		}
		Class<?> cls = bean.getClass();
		Method[] methods = cls.getDeclaredMethods();
		Field[] fields = cls.getDeclaredFields();
		for (Field field : fields) {
			try {
				String fieldGetName = parGetName(field.getName());
				if (!checkGetMet(methods, fieldGetName)) {
					continue;
				}
				Method fieldGetMet = cls.getMethod(fieldGetName, new Class[] {});
				Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});
				if (fieldVal != null) {
					if ("".equals(fieldVal)) {
						result = true;
					} else {
						result = false;
					}
				}
			} catch (Exception e) {
				continue;
			}
		}
		return result;
	}

	/**
	 * 实体对比参数赋值,返回被添加实体 param
	 * 
	 * @param param
	 * @param iparam2
	 * @return
	 * @throws Exception
	 */
	public static Object setEntitySameparameter(Object param, Object iparam2) throws Exception {
		System.out.println(iparam2);
		Class<?> iparam2Cls = iparam2.getClass();
		Field[] iparam2field = iparam2Cls.getDeclaredFields();

		Class<?> paramCls = param.getClass();
		Field[] paramfields = paramCls.getDeclaredFields();

		for (Field paramfield : paramfields) {// 接口参数

			for (Field param2fieldfield : iparam2field) {// 接口
				/**
				 * 获取get set 方法名
				 */
				String paramSetName = parSetName(paramfield.getName());
				String paramGetName = parGetName(paramfield.getName());
				String param2GetName = parGetName(param2fieldfield.getName());
				/**
				 * 获取 get set 方法
				 */
				Method paramSetMet = paramCls.getMethod(paramSetName, paramfield.getType());

				Method param2GetMet = iparam2Cls.getMethod(param2GetName, new Class[] {});

				if (paramGetName.equals(param2GetName) && param2GetMet.invoke(iparam2, new Object[] {}) != null) {
					paramSetMet.invoke(param, param2GetMet.invoke(iparam2, new Object[] {}));
				}
			}

		}
		return param;
	}
}
